Description

6-Amino-5-[(2,5-Dichloro-4-Sulphophenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its core value lies in its role as a key precursor for synthesizing specific, high-performance dyes and pigments, particularly those requiring a stable chromophore with sulphonic acid groups for enhanced solubility and fiber affinity. This compound is essential for manufacturers and R&D laboratories in the dyestuff, textile, and specialty chemical industries seeking to develop or produce colorants with specific shades and properties.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring wool, silk, nylon, and paper.
• Textile Dye Manufacturing: Used to produce dyes that offer good lightfastness and washfastness on polyamide and protein-based fibers.
• Specialty Pigment Synthesis: Acts as a precursor in the development of lake pigments and other colorants for inks and coatings.
• Research & Development: Employed in chemical research for studying azo coupling reactions and developing novel chromophores with specific spectral properties.
• Analytical Chemistry Reagent: Can be utilized as a staining agent or a complexometric indicator in certain analytical procedures.

Basic Information

Product Name	6-Amino-5-[(2,5-Dichloro-4-Sulphophenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	85536-97-6
Molecular Formula	C16H9Cl2N4O7S2Na
Molecular Weight	527.28 g/mol
Synonyms	6-Amino-4-hydroxy-5-[(2,5-dichloro-4-sulfophenyl)azo]-2-naphthalenesulfonic acid, sodium salt; C.I. 27290; Acid Red 337 (related lake/precursor); Sodium 6-amino-5-[(2,5-dichloro-4-sulfophenyl)azo]-4-hydroxy-2-naphthalenesulfonate; 2-Naphthalenesulfonic acid, 6-amino-5-[(2,5-dichloro-4-sulfophenyl)azo]-4-hydroxy-, monosodium salt; Azo dye intermediate 27290; 6-Amino-4-hydroxy-2-naphthalenesulfonic acid azo derivative
EINECS	Contact for details

Quality Control

Our 6-Amino-5-[(2,5-Dichloro-4-Sulphophenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid, Sodium Salt is produced under strict quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance as a dye intermediate. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The compound may be hygroscopic; protect from excessive moisture to prevent caking or degradation.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.